Where do I type how much I pumped?

The amount comes after the pump, because nothing is pumped yet when you start.

1. Stop the pumping timer in the app.
2. Veilleuse asks How much? Type the amount, for both sides together or Different for each side.
3. Tap the button at the bottom.

Stopped it from the lock screen or Siri? On Home, tap the pumping entry, then its Amount row. For a pump that is already over, tap Already done when you log it: the amount comes next.